Opopaea semilunata sp. nov.

(Figures 11, 12 A, B, G, H)

Type material. Holotype: female (IZCAS Ar-25042), China: Yunnan Province, Mengla County, Menglun Town, XTBG, Paramichelia baillonii plantation (21º54.200′N, 101º16. 923′E, Alt: 608 m), pitfall traps, 1–15 February 2007, leg. G. Zheng. Paratypes: 1 female (IZCAS Ar-25043), same data as holotype, 1–15 July 2007; 1 female (IZCAS Ar-25044), same data as holotype, 16–31 April 2007; 2 females (IZCAS Ar-25045), same data as holotype, 1–9 November 2006; 1 female (IZCAS Ar-25033), same data as holotype; 1 female (IZCAS Ar-25034), same data as holotype; 1 female (IZCAS Ar-25035), same data as holotype; 1 female (IZCAS Ar-25036), same data as holotype; 1 female (IZCAS Ar-25037), same data as holotype; 1 female (IZCAS Ar-25039), same data as holotype, 1–9 July 2006; 1 female (IZCAS Ar-25040), same data as holotype; 1 female (IZCAS Ar-25041), same data as holotype; 1 female (IZCAS Ar-25038), same data as holotype.

Etymology. The specific name “ semilunata ” is a Latin adjective, meaning half-moon shaped, referring to the shape of postgynum depression in females.

Diagnosis. The new species is similar to O. striata Baehr, 2013, but can be distinguished by the absence of dorsolateral, triangular extensions on scuto-pedicel region (compare Fig. 11 H and Baehr et al. 2013: Fig. 26E), and by a long median triangular extension (lte) in female genital area (compare Fig. 12 G and Baehr et al. 2013: Fig. 26F).

Description. Female (holotype). Reddish brown species with yellow legs. Body length 1.55; carapace 0.63 long, 0.54 wide; abdomen 0.92 long, 0.72 wide. Habitus as in Fig. 11 A, B. Carapace: broadly oval in dorsal view, sides with longitudinal streaks; dorsal area smooth with some hairs at lateral edges; pars cephalica slightly elevated in lateral view (Fig. 11 D); lateral margin rebordered. Eyes: six, well developed, ALE and PME nearly equal sized, PLE smallest; posterior eye row straight from above, procurved from front; ALE separated by more than their radius, ALE-PLE separated by less than ALE radius, PME touching throughout most of their length, PLE-PME separated by less than PME radius. Clypeus margin unmodified; clypeus height about 1.5 times ALE diameter (Fig. 11 F). Sternum as long as wide, uniform, fused to carapace; radial furrows present between coxae I- II, II-III, III-IV, with rows of small pits; surface smooth, without pits, microsculpture only in furrows (Fig. 11 E). Anterior end of endites unmodified. Legs short, thick and spineless. Abdomen: dorsal scutum strongly sclerotized, punctate, covering full length of abdomen. Book lung covers small, ovoid, without setae. Pedicel tube short, ribbed, without small, dorsolateral, triangular extensions, scuto-pedicel region higher than diameter of pedicel, with nearly straight scutal ridges (Fig. 11 H), scutum not extending far dorsal of pedicel. Posterior spiracles connected by groove (Fig. 11 G); posteriorly directed apodemes present. Genitalia (Fig. 12 A, B, G, H): in ventral view with a long median triangular extension (lte) and a large, semicircular postgynum depression; in dorsal view paddle-like sclerite (pls) with thin straight arms bent at end; nail-like process (nlp) small; globular appendix (ga) small.

Male. Unknown.

Distribution. Known only from the type locality.